Conference paper (MFB)

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Browsing Conference paper (MFB) by Author "Gopakumar, K."

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    Distribution of Clostridium botulinum in cured fishery products
    (FAO, 1998) Lalitha, K.V.; Gopakumar, K.
    A total of forty cured fish samples procured from local retail markets in and around Cochin were analysed for the moisture content, salt content, water activity (aw) and for the presence of Clostridium botulinum. Wide variations in the salt concentration and moisture level were observed in the cured fish samples examined. Fifty five percent (22140) of the samples had water content in the range of 454%. THe sodium chloride content of the cured fish samples varied between 16- 25% in only 60 percent of the samples. The sodium chloride content of less than 7% was noticed in 8 prawn samples. The aw of the samples varied greatly. Clostridium botulinum was detected in 13% of the cured fish samples and type D was predominant (415) followed by type C (115). Clostridium botulinum spores remain viable at aw level 0.75. The incidence of C. botulinum in cured fish should emphasize the need for adequate brining and drying to protect these products until their final use.
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    INCIDENCE AND VIABILITY OF L. MONOCYTOGENES IN SEAFOOD HANDLING AND PROCESSING
    (Food and Agriculture Organization, 1995) Iyer, T.S.G.; Varma, P.R.G.; Gopakumar, K.
    Listeria monocytogenes was absent in all the 361 samples of frozen shrimps taken from the export trade. The organism survives freezing and further storage at -18°C for over two years. In water L. monocytogenes survives 10-30 days at room temperature (28-30°C) and 70-110 days at refrigerated temperature (5-1O°C) depending upon the initial load in the water sample. The process water in seafood processing factories should be chlorinated to a residual level of 10 ppm. to get full protection against L. monocytogenes.